package com.charry.utils;

import java.util.Random;

/**
 * Created by Charry on 2017/11/3.
 */
public class KeyUtil {

    /**
     * 生成唯一的主键
     * 格式: 时间 + 随机数
     */
    public static synchronized String genUniqueKey() {
        Random random = new Random();
        Integer i = random.nextInt(900000) + 100000;
        return System.currentTimeMillis() + String.valueOf(i);
    }


}
